All you have to do is right click on the Norton icon in the notification area (where the clock and volume are usuallyfound) and there is an option to disable NIS or disable NAV autoprotect. The NIS icon looks like a yellow football.

When you select disable it will prompt you to enter how long you want to disable it for - 5 mins, 30 mins, 1 hour, 4 hours or until the system restarts.

Whatever you choose NIS will load normally when you reboot.

I hope you are feeling lucky! :-)